1 /*-
2 * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
3 * Copyright (c) 2001-2012 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
4 * Copyright (c) 2003 Peter Wemm
5 * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/9.1/sys/i386/acpica/acpi_wakeup.c 235796 2012-05-22 17:44:01Z iwasaki $");
32
33 #include <sys/param.h>
34 #include <sys/bus.h>
35 #include <sys/eventhandler.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/memrange.h>
39 #include <sys/smp.h>
40
41 #include <vm/vm.h>
42 #include <vm/pmap.h>
43
44 #include <machine/clock.h>
45 #include <machine/intr_machdep.h>
46 #include <x86/mca.h>
47 #include <machine/pcb.h>
48 #include <machine/pmap.h>
49 #include <machine/specialreg.h>
50 #include <machine/md_var.h>
51
52 #ifdef SMP
53 #include <x86/apicreg.h>
54 #include <machine/smp.h>
55 #include <machine/vmparam.h>
56 #endif
57
58 #include <contrib/dev/acpica/include/acpi.h>
59
60 #include <dev/acpica/acpivar.h>
61
62 #include "acpi_wakecode.h"
63 #include "acpi_wakedata.h"
64
65 /* Make sure the code is less than a page and leave room for the stack. */
66 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
67
68 extern int acpi_resume_beep;
69 extern int acpi_reset_video;
70
71 #ifdef SMP
72 extern struct pcb **susppcbs;
73 #else
74 static struct pcb **susppcbs;
75 #endif
76
77 static void *acpi_alloc_wakeup_handler(void);
78 static void acpi_stop_beep(void *);
79
80 #ifdef SMP
81 static int acpi_wakeup_ap(struct acpi_softc *, int);
82 static void acpi_wakeup_cpus(struct acpi_softc *, const cpuset_t *);
83 #endif
84
85 #define ACPI_PAGETABLES 0
86 #define WAKECODE_VADDR(sc) ((sc)->acpi_wakeaddr + (ACPI_PAGETABLES * PAGE_SIZE))
87 #define WAKECODE_PADDR(sc) ((sc)->acpi_wakephys + (ACPI_PAGETABLES * PAGE_SIZE))
88 #define WAKECODE_FIXUP(offset, type, val) do { \
89 type *addr; \
90 addr = (type *)(WAKECODE_VADDR(sc) + offset); \
91 *addr = val; \
92 } while (0)
93
94 static void
95 acpi_stop_beep(void *arg)
96 {
97
98 if (acpi_resume_beep != 0)
99 timer_spkr_release();
100 }
101
102 #ifdef SMP
103 static int
104 acpi_wakeup_ap(struct acpi_softc *sc, int cpu)
105 {
106 int vector = (WAKECODE_PADDR(sc) >> 12) & 0xff;
107 int apic_id = cpu_apic_ids[cpu];
108 int ms;
109
110 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[cpu]);
111
112 /* do an INIT IPI: assert RESET */
113 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
114 APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, apic_id);
115
116 /* wait for pending status end */
117 lapic_ipi_wait(-1);
118
119 /* do an INIT IPI: deassert RESET */
120 lapic_ipi_raw(APIC_DEST_ALLESELF | APIC_TRIGMOD_LEVEL |
121 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, 0);
122
123 /* wait for pending status end */
124 DELAY(10000); /* wait ~10mS */
125 lapic_ipi_wait(-1);
126
127 /*
128 * next we do a STARTUP IPI: the previous INIT IPI might still be
129 * latched, (P5 bug) this 1st STARTUP would then terminate
130 * immediately, and the previously started INIT IPI would continue. OR
131 * the previous INIT IPI has already run. and this STARTUP IPI will
132 * run. OR the previous INIT IPI was ignored. and this STARTUP IPI
133 * will run.
134 */
135
136 /* do a STARTUP IPI */
137 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
138 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
139 vector, apic_id);
140 lapic_ipi_wait(-1);
141 DELAY(200); /* wait ~200uS */
142
143 /*
144 * finally we do a 2nd STARTUP IPI: this 2nd STARTUP IPI should run IF
145 * the previous STARTUP IPI was cancelled by a latched INIT IPI. OR
146 * this STARTUP IPI will be ignored, as only ONE STARTUP IPI is
147 * recognized after hardware RESET or INIT IPI.
148 */
149
150 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
151 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
152 vector, apic_id);
153 lapic_ipi_wait(-1);
154 DELAY(200); /* wait ~200uS */
155
156 /* Wait up to 5 seconds for it to start. */
157 for (ms = 0; ms < 5000; ms++) {
158 if (susppcbs[cpu]->pcb_eip == 0)
159 return (1); /* return SUCCESS */
160 DELAY(1000);
161 }
162 return (0); /* return FAILURE */
163 }
164
165 #define WARMBOOT_TARGET 0
166 #define WARMBOOT_OFF (KERNBASE + 0x0467)
167 #define WARMBOOT_SEG (KERNBASE + 0x0469)
168
169 #define CMOS_REG (0x70)
170 #define CMOS_DATA (0x71)
171 #define BIOS_RESET (0x0f)
172 #define BIOS_WARM (0x0a)
173
174 static void
175 acpi_wakeup_cpus(struct acpi_softc *sc, const cpuset_t *wakeup_cpus)
176 {
177 uint32_t mpbioswarmvec;
178 int cpu;
179 u_char mpbiosreason;
180
181 /* save the current value of the warm-start vector */
182 mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
183 outb(CMOS_REG, BIOS_RESET);
184 mpbiosreason = inb(CMOS_DATA);
185
186 /* setup a vector to our boot code */
187 *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
188 *((volatile u_short *)WARMBOOT_SEG) = WAKECODE_PADDR(sc) >> 4;
189 outb(CMOS_REG, BIOS_RESET);
190 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */
191
192 /* Wake up each AP. */
193 for (cpu = 1; cpu < mp_ncpus; cpu++) {
194 if (!CPU_ISSET(cpu, wakeup_cpus))
195 continue;
196 if (acpi_wakeup_ap(sc, cpu) == 0) {
197 /* restore the warmstart vector */
198 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
199 panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)",
200 cpu, cpu_apic_ids[cpu]);
201 }
202 }
203
204 /* restore the warmstart vector */
205 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
206
207 outb(CMOS_REG, BIOS_RESET);
208 outb(CMOS_DATA, mpbiosreason);
209 }
210 #endif
211
212 int
213 acpi_sleep_machdep(struct acpi_softc *sc, int state)
214 {
215 #ifdef SMP
216 cpuset_t wakeup_cpus;
217 #endif
218 register_t cr3, rf;
219 ACPI_STATUS status;
220 struct pmap *pm;
221 int ret;
222
223 ret = -1;
224
225 if (sc->acpi_wakeaddr == 0ul)
226 return (ret);
227
228 #ifdef SMP
229 wakeup_cpus = all_cpus;
230 CPU_CLR(PCPU_GET(cpuid), &wakeup_cpus);
231 #endif
232
233 if (acpi_resume_beep != 0)
234 timer_spkr_acquire();
235
236 AcpiSetFirmwareWakingVector(WAKECODE_PADDR(sc));
237
238 rf = intr_disable();
239 intr_suspend();
240
241 /*
242 * Temporarily switch to the kernel pmap because it provides
243 * an identity mapping (setup at boot) for the low physical
244 * memory region containing the wakeup code.
245 */
246 pm = kernel_pmap;
247 cr3 = rcr3();
248 #ifdef PAE
249 load_cr3(vtophys(pm->pm_pdpt));
250 #else
251 load_cr3(vtophys(pm->pm_pdir));
252 #endif
253
254 if (suspendctx(susppcbs[0])) {
255 #ifdef SMP
256 if (!CPU_EMPTY(&wakeup_cpus) &&
257 suspend_cpus(wakeup_cpus) == 0) {
258 device_printf(sc->acpi_dev, "Failed to suspend APs\n");
259 goto out;
260 }
261 #endif
262
263 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0));
264 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0));
265
266 WAKECODE_FIXUP(wakeup_cr4, register_t, susppcbs[0]->pcb_cr4);
267 WAKECODE_FIXUP(wakeup_cr3, register_t, susppcbs[0]->pcb_cr3);
268
269 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[0]);
270
271 /* Call ACPICA to enter the desired sleep state */
272 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
273 status = AcpiEnterSleepStateS4bios();
274 else
275 status = AcpiEnterSleepState(state);
276
277 if (status != AE_OK) {
278 device_printf(sc->acpi_dev,
279 "AcpiEnterSleepState failed - %s\n",
280 AcpiFormatException(status));
281 goto out;
282 }
283
284 for (;;)
285 ia32_pause();
286 } else {
287 pmap_init_pat();
288 initializecpu();
289 PCPU_SET(switchtime, 0);
290 PCPU_SET(switchticks, ticks);
291 #ifdef SMP
292 if (!CPU_EMPTY(&wakeup_cpus))
293 acpi_wakeup_cpus(sc, &wakeup_cpus);
294 #endif
295 ret = 0;
296 }
297
298 out:
299 #ifdef SMP
300 if (!CPU_EMPTY(&wakeup_cpus))
301 restart_cpus(wakeup_cpus);
302 #endif
303
304 load_cr3(cr3);
305 mca_resume();
306 intr_resume();
307 intr_restore(rf);
308
309 AcpiSetFirmwareWakingVector(0);
310
311 if (ret == 0 && mem_range_softc.mr_op != NULL &&
312 mem_range_softc.mr_op->reinit != NULL)
313 mem_range_softc.mr_op->reinit(&mem_range_softc);
314
315 return (ret);
316 }
317
318 static void *
319 acpi_alloc_wakeup_handler(void)
320 {
321 void *wakeaddr;
322 int i;
323
324 /*
325 * Specify the region for our wakeup code. We want it in the low 1 MB
326 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA
327 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT),
328 * and ROM area (0xa0000 and above). The temporary page tables must be
329 * page-aligned.
330 */
331 wakeaddr = contigmalloc((ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF,
332 M_NOWAIT, 0x500, 0xa0000, PAGE_SIZE, 0ul);
333 if (wakeaddr == NULL) {
334 printf("%s: can't alloc wake memory\n", __func__);
335 return (NULL);
336 }
337 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL,
338 EVENTHANDLER_PRI_LAST) == NULL) {
339 printf("%s: can't register event handler\n", __func__);
340 contigfree(wakeaddr, (ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF);
341 return (NULL);
342 }
343 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK);
344 for (i = 0; i < mp_ncpus; i++) {
345 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK);
346 }
347
348 return (wakeaddr);
349 }
350
351 void
352 acpi_install_wakeup_handler(struct acpi_softc *sc)
353 {
354 static void *wakeaddr = NULL;
355
356 if (wakeaddr != NULL)
357 return;
358
359 wakeaddr = acpi_alloc_wakeup_handler();
360 if (wakeaddr == NULL)
361 return;
362
363 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr;
364 sc->acpi_wakephys = vtophys(wakeaddr);
365
366 bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode));
367
368 /* Patch GDT base address, ljmp target. */
369 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t,
370 WAKECODE_PADDR(sc) + bootgdt);
371 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t,
372 WAKECODE_PADDR(sc) + wakeup_32);
373
374 /* Save pointers to some global data. */
375 WAKECODE_FIXUP(wakeup_ret, void *, resumectx);
376
377 if (bootverbose)
378 device_printf(sc->acpi_dev, "wakeup code va %#x pa %#jx\n",
379 sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
380 }
Cache object: 89c6f04f4b994ad0fb4f6b831fd2b261
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